Loose-leaf book



w. WILBURGER.

LOOSE LEAF BOOK.

APPLICATION FILED DEC. I2, 1921.

Patented Nov. 2s, 1922.,

www-

yPatented Nov, 28, 1922.s

kwrLLLuu wILBUneEn, or isaoorznviv, New YORK.

LOOSE-LEAF BOOK.

f i y Application filed December 12, 1921.` Serial No. 521,781.4

To all 'whom i? may concern.' i

4 Be it known-that I, WILLIAM VILBURGER, acitizen of the United Sta-tes, and-resident of Brooklyn, in the county of Iiings and Stateof New York, have invented certainl new and luseful Improvements in. Loose- Leaf Books, of which the following isa full, clear, and exact'specification.` i

[This inventionr relates toV loose leaf b1nders or books and has for its object ytoprovide improved means -for attachingbinder posts thereto'.- i

.It isf desirable to havethe heads of the f binder posts concealedfrointhe outside of the book, so that there will `be no danger o' saidheads. scratching the'y surface on which the book is laid. y Itxis also desirable to be able to quicklyattach and detach the posts and at thesame'time to insurewagainst acci- 20 dental-separation vor displacementxof said postsfromlthe binder. -The presea'itinven-I tion 'contemplates the provision of means for i .accomplishing these .desired results,

" Other .objects will appear as the description proceeds. p

4 Theinvention will be first hereinafter-'described in connection with the accompanying drawings, which constitute part of this speciicatiomand then more specically pointed out in the claims at the end of the descrip- Y tion.

In the accompanying drawings, wherein similar reference characters are used to designate corresponding parts throughout the several views: y

Figure 1 is a sectional view of a loose vleaf binder or book embodying the present invention, the section being taken in line with one of the binder posts which is itself shown in elevation, and the top of the book being open. y p

Figure 2 is a fragmentary view of the inner portion of thebinder Ashowing postholding means attached to the inner sur- -posts project through the top of the binder.

Figure 4f is a Ldetailed longitudinal section of one of the posts drawn toa larger scale, and

' Figure 5 is a lower end view post. v t .i y

Rejierring irst to Figures 1 and 2, the

, back 1 of the binder has top and bottom cov-r ers 2 and 3, rospectively,hinged thereto by of um binder flexible stripsy 4r., preferably arranged between parallelheads 5, so that said covers may be folded flat upon'said back as the top .cover is shown inrFigure 1. To the inner faces of the upper and lower portions of the back 1 metal strips 6 are fastened in any suitable manner so as toertend substantially the kiull width ofthe book. Each strip Ghas toi'igues 7 cut therefrom andextending parallel thereto at a suitable distance to permit the heads of the binder y'posts to bein- I tongue is slit longitudinally to 'form ai key-A slot-8 having a round vinner portion 9 and outwardly diverging lateral edges 10.

The binder postsll are preferably` made as best shown in lFigure geachhavingits shank formed from a single'pieceofcoiled wire` the upper end portionv 19. being of serte'd between'the tongues and strips.' Each smaller diameter than the lower portionlB,

to facilitate theplacing of leaves 14 over said Shanks. Each leajfhas ahole 15 to loosely fit over theshank offeach binderpost "A head 16 is formed integral with the lower end of the shank of each post by extending the wire in a pluralityof spiral coils all lying in the same plane at right angles to the axis of the shank. The upper end of each shank is fitted with a removable head 17v which may have a pair otprongs 18 to extend into the reduced upper end portion 12. rllhe inner ends of said prongs are preferably spread apart at 19 to yieldingly engage the rspaces between the coils of the wire for retaining thehhead in placeA but the prongs are'sufiiciently resilient to permit said spread ends 19 to be inserted into the upper` end 12 of the shank without diihculty.k v

The binder posts are attached to the back of the binder by engaging their lower ends with the key-slots 8 in the lowerstrip 6; In effecting this engagement the integralr lower heads 16 of the binder posts are inserted between the tongues? andthe plate 6, while the lower end portions of the Shanks of said posts arepushed along between the diverging edges or the key-slots 8 `until they snap intoengagement with the round inner ends 9 lthereof it being understood that said rounded ends 9 are of substantially the same diameter as said lower yends of the Shanks,

and that the coiled spring wire ot which said shanls are made has sutlicient resiliency to permit them to pass the restricted portions ot the key-slots at the junctions ot said diif'erging edges l0 and round ends 9. rllie heads 17 are removed trom the shanlrs ot the posts ivhile the leaves are oeing placed in the binder, and are engaged with their shanks after being attached to the tongues 7 ot the upper strip 6, as shownin Figure 2. Said removable heads 17 are engagedivith said tongues by means ot the key-slots S therein, as Will be readily understood from the showing in Figures l and 2.

As shown in Figure 3, the metal strip G may be omitted trom the upper portion ot the binder and the latter provided with holes 2O through Which the prongs 18 on the removable heads 17 are passed to with the upper ends oit the shanlrs ot the binder posts. ln this inodiiied torni ot the invention saidl removable heads l? are er;- posed on the outside ot the upper :tace oi the binder but this is not objectionable because 'said heads do not comein contact With the surface on Which'the bool; is laid, unless said book is turned completely over by mistake and the exposure ot' said heads serve as a Warning against such an occurrence.

l claim: l

l. The combination with a loose leaf binder,l of a metal strip secured to its inner surfaeevand having an integral key-slotted tongue out and spaced from said strip, and a binder post having' a shank to engage said slot substantially as' described.

2. The combination with a loose leaf ,ses

binder, oi a inet-al strip secured to its inner surface, key-slotted tongues spaced from said strip, said slots having round inner portions and converging marginal portions leading to said round portions from the edges of the tongues, and binder posts to engage said slots substantially as described.

il 'l`lie combination With a loose lea'tl binder, of metal strip secured to its inner surface, key-slotted tongues spaced trom said strip, said slots having round inner portions and converging marginal portions leading to said round/'portions from the edges ot the tongues` the space between the inner ends ot said converging portions being less than the diameter oit said round portions, and binder posts having yresilient shanks to engage said slots substantially as described. f j

ll. The combination kwith a loose leaf binder, ot a metal strip secured to its inner surf-ace, a key-slotted tongueattached to and spaced from said strip,v said slot having a round inner portion and converging inarginal portions leading to said round portion trom the edge ot the tongue, the space between the .inner ends of said converging` portions beingless thant-he diameter of said round portion, and a binder post having a head to between the tongue and strip7 and a shank ot substantially the same diameter as said round portion ot the slotto engage the latter er being torced between the inner ends oit said converging portions.

ln testimony whereof l have signed my naine to this specilication.`

VILLIAM VVILBURGER; 

